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Why Should Bauxite Be Calcined For Refractory Materials

Views: 201     Author: SEPPE     Publish Time: 2023-06-07      Origin:

The bauxite used in the refractory industry usually refers to bauxite clinker, and the extracted bauxite needs to be calcined to become clinker. After firing, bauxite can reduce the proportion of impurities in the raw ore and further improve its water absorption, density, and fire resistance. Clinker exhibits different colors due to different impurities and calcination methods.

SEPPE Alumina clinker can be roughly divided into special grade bauxite, first grade bauxite, and second grade bauxite based on the content of impurities such as AL2O3 and Fe2O3, SiO2, as well as the volume density and water absorption of the calcined bauxite.

SEPPE usually uses the Al2O3 content of bauxite as a grade indicator, which is usually divided into 65% bauxite, 70% bauxite, 75% bauxite, 80% bauxite, and 85% bauxite. According to specifications, it can be divided into: bauxite aggregate: 0-1 mm, 1-3 mm, 3-5 mm, 5-8mm, etc. Bauxite powder: 200 mesh, 325 mesh (various specifications can be produced according to customer requirements).

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